Table 4.
Clinical features indicative of VITT.
| Clinical Findings |
|---|
| (1) Onset 4–28 days after vaccination (counting the day of vaccination as day 0) |
| (2) Symptoms suggestive of stroke (unilateral facial palsy, unilateral motor palsy, language disorder, joint parallax, hemispheric neglect, etc.) |
| (3) Symptoms suggestive of cerebral venous sinus thrombosis (persistent headache, visual disturbance, seizure, nausea and vomiting, psychiatric symptoms, etc.) |
| (4) Symptoms suggestive of visceral vein thrombosis (persistent abdominal pain, nausea and vomiting, etc.) |
| (5) Symptoms suggestive of deep vein thrombosis or pulmonary thromboembolism (pain and swelling in lower limbs, chest and back pain, shortness of breath, etc.) |
| (6) Hemorrhagic tendencies such as hemorrhagic infarction, petechial hemorrhage, and mottled hemorrhage can also occur. |